Severe Thunderstorm Warning 171, NWS Goodland, KS

Issued

Aug 31, 2002, 5:30 PM MDT (23:30 UTC)

Expired

Aug 31, 2002, 6:30 PM MDT

In force

60 min

Issued by

NWS Goodland, KS

Area

Counties, with a storm outline in the text

County Yuma County, CO

The Goodland radar (KGLD), 100 km from the middle of the area, began a volume at 23:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

901 
WUUS53 KGLD 312330
SVRGLD
COC125-010030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GOODLAND KS
528 PM MDT SAT AUG 31 2002

THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  YUMA COUNTY IN NORTHEAST COLORADO

* UNTIL 630 PM MDT

* AT 528 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF HEARTSTRONG...OR ABOUT 12
  MILES SOUTHEAST OF YUMA...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ECKLEY AT 540 PM MDT
  VERNON AT 550 PM MDT
  WRAY AT 615 PM MDT
  LAIRD AT 630 PM MDT

AT 5 PM THIS STORM PRODUCED HAIL THE SIZE OF DIMES 8 MILES SOUTH 
SOUTHEAST OF THE TOWN OF YUMA. AT 515 PM HAIL THE SIZE OF PENNIES 
WAS REPORTED 8 SOUTHWEST OF ECKLEY.

HAIL UP TO ONE INCH IN DIAMETER AND STRONG AND DAMAGING WINDS OF 60
MPH OR MORE CAN BE EXPECTED WITH THIS STORM.

WHEN THUNDERSTORMS ARE OCCURRING...MOVE INDOORS. DO NOT STAND BY
WINDOWS. UNLESS IT IS AN EMERGENCY...AVOID USING TELEPHONES THAT HAVE
CORDS ATTACHED TO THEM...COMPUTERS...AND ELECTRICAL APPLIANCES UNTIL
THE STORM HAS PASSED. DAMAGING WINDS...LARGE HAIL...VERY HEAVY
RAIN...AND FREQUENT DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE
THUNDERSTORMS.

&&

LAT...LON 4007 10270 3990 10260 3995 10209 4032 10210

RJC

NWS Goodland, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 31, 2:15 PM MDT, 3 hours 15 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
215 PM MDT SAT AUG 31 2002

FORECAST CONCERNS ARE HIGH TEMPS THE NEXT FEW DAYS AND CHANCES OF
ISOLATED THUNDERSTORMS TONIGHT THROUGH SUNDAY EVENING.

12Z UPPER AIR ANALYSIS SHOWING RIDGING FROM THE SOUTHERN PLAINS
EXTENDING NORTHWARD OVER THE WESTERN HIGH PLAINS. WEAK WESTERLY FLOW
IN THE MID AND UPPER LEVELS WITH SOME DRY AIR ADVECTING WESTWARD AT
THE 700 MB LEVEL. THE PERSISTENT LEE TROUGH OVER THE CO/KS BORDER
THIS AFTERNOON...WILL BEGIN TO DRIFT EAST ON SUNDAY/MONDAY AS A WEAK MID
LEVEL TROUGH APPROACHES FROM THE WEST. DRY AIR AT 700 MB AND WEAK
SUBSIDENCE WILL SUPPRESS THUNDERSTORM DEVELOPMENT TONIGHT. ANY
ACTIVITY WILL BE VERY ISOLATED.

AS A WEAK MID LEVEL TROUGH MOVES THROUGH THE AREA ON
SUNDAY...ISOLATED THUNDERSTORMS WILL BE POSSIBLE OVER THE CENTRAL
AND EASTERN COUNTIES BY AFTERNOON WITH FAVORABLE LOW/MID LEVEL
MOISTURE COMBINED WITH STEEPENING LAPSE RATES. DRIER AIR IN THE MID
LEVELS WILL INHIBIT THUNDERSTORM DEVELOPMENT OVER FAR EASTERN
COLORADO AND EXTREME WESTERN KANSAS. WILL KEEP A SLIGHT CHANCE OVER
THE CENTRAL COUNTIES AND ADD A SLIGHT CHANCE TO THE EASTERN COUNTIES
FOR SUNDAY AFTERNOON AND EVENING...BEFORE LOSS OF HEATING AND DRIER
MID LEVEL AIR SUPPRESS ACTIVITY SHORTLY AFTER DARK. MESO ETA 850 MB
TEMPS SUPPORT HIGHS IN THE LOW TO MID 90S...WHICH IS SLIGHTLY WARMER
COMPARED TO LATEST MOS GUIDANCE.

AS THE WEAK MID LEVEL TROUGH PASSES THROUGH ON MONDAY...THE SURFACE
BOUNDARY/LEE TROUGH WILL SHIFT EAST...ALLOWING WINDS TO BECOME NORTH
OVER THE NORTHERN HALF OF THE CWA. RETURN FLOW WILL OCCUR OVERNIGHT.
THICKNESS VALUES REMAIN NEARLY STEADY...SO WILL ONLY ADJUST TEMPS
DOWN A FEW DEGREES FOR MONDAY. AT THE SAME TIME...ETA/AVN AMPLIFY THE
RIDGE OVER THE SOUTHWEST STATES AND BRING IT INTO THE WESTERN HIGH
PLAINS ON TUESDAY. THIS RIDGE WILL PROVIDE A SUBSIDENT AIRMASS
THROUGH THE REMAINDER OF THE FORECAST PERIODS. MAY ADJUST TEMPS UP
SLIGHTLY AS MID/UPPER RIDGE REMAINS OVER THE AREA. LATEST MRF BEGINS
TO BREAK THE RIDGE DOWN BY NEXT WEEKEND AS A TROUGH LIFTS OUT OF THE
NORTHWEST STATES. WILL KEEP SAT DRY FOR NOW AND WAIT FOR RUN TO RUN
CONSISTENCY BEFORE ADDING POPS.

.GLD...NONE.

MCGUIRE

In the hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
518 PM MDT SAT AUG 31 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0500 PM    8 SSE YUMA                CO   .75 INCH HAIL
08/31/02   YUMA                           REPORTED BY PUBLIC.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
522 PM MDT SAT AUG 31 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0515 PM    8 SW ECKLEY               CO   .75 INCH HAIL
08/31/02   YUMA                           REPORTED BY STORM
                                          SPOTTER.

Severe Thunderstorm Warnings in Colorado, 2002Every severe thunderstorm warning in 2002

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.